#region Copyright

// The contents of this file are subject to the Mozilla Public License
//  Version 1.1 (the "License"); you may not use this file except in compliance
//  with the License. You may obtain a copy of the License at
//  
//  http://www.mozilla.org/MPL/
//  
//  Software distributed under the License is distributed on an "AS IS"
//  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
//  License for the specific language governing rights and limitations under 
//  the License.
//  
//  The Initial Developer of the Original Code is Robert Smyth.
//  Portions created by Robert Smyth are Copyright (C) 2008.
//  
//  All Rights Reserved.

#endregion

using NoeticTools.StateEngine.Mapper;


namespace NoeticTools.StateEngine.Canned.SimpleService
{
    public class SimpleServiceStateEngine<TContext, TBusyClass> : ISimpleServiceStateEngine<TContext>
        where TContext : class
        where TBusyClass : TContext
    {
        private readonly IStateEngine<TContext, SimpleServiceState, SimpleServiceStateEvent>
            stateEngine;

        public SimpleServiceStateEngine(
            IStateEngine<TContext, SimpleServiceState, SimpleServiceStateEvent> stateEngine)
        {
            this.stateEngine = stateEngine;
        }

        public IStateEngineMapper<TContext, SimpleServiceState, SimpleServiceStateEvent>
            Mapper
        {
            get { return stateEngine.Mapper; }
        }

        public TContext CurrentState
        {
            get { return stateEngine.CurrentState; }
        }

        public TContext OnEvent(SimpleServiceStateEvent stateEvent)
        {
            return OnEvent(stateEvent, new object[0]);
        }

        public TContext OnEvent<T>(SimpleServiceStateEvent stateEvent, T arg)
        {
            return stateEngine.OnEvent(stateEvent, arg);
        }

        public void Start()
        {
            stateEngine.Mapper
                .State(SimpleServiceState.Busy).Uses<TBusyClass>()
                .State(SimpleServiceState.Idle).TransitionsTo(SimpleServiceState.Busy).On(
                SimpleServiceStateEvent.StartOperation)
                .State(SimpleServiceState.Busy).TransitionsTo(SimpleServiceState.Idle).On(
                SimpleServiceStateEvent.Completed);
        }
    }
}